Microbiology Lab Quiz
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Quiz for microbiology JCC campus
- 1.
Turbidity is what?
- A.
Bacteria settle at the bottom
- B.
Bacteria move in a fast manor
- C.
Cloudiness
- D.
Bacteria grows up the side of glass
Correct Answer
C. CloudinessExplanation
Turbidity refers to the cloudiness of a liquid caused by the presence of suspended particles. In this context, it is used to describe the characteristic of cloudiness in a liquid. The answer "Cloudiness" accurately reflects the definition of turbidity.Rate this question:
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- 2.
Sedimentation is what?
- A.
Turbidity
- B.
Bacteria settle on the bottom
- C.
Bacteria grow on surface
- D.
Bacteria suspended throughout entire broth
Correct Answer
B. Bacteria settle on the bottomExplanation
Sedimentation refers to the process where particles or substances in a liquid settle down and accumulate at the bottom. In the context of the given options, sedimentation would mean that bacteria settle on the bottom of the liquid or broth. This indicates that the bacteria are not suspended throughout the entire broth but rather have settled down, possibly due to gravity or other factors.Rate this question:
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- 3.
What is pellicle?
- A.
Scum layer where bacteria grows on surface
- B.
Bacteria growing up the side of the glass
- C.
Bacteria suspended throughout the entire broth
- D.
Cloudiness
Correct Answer
A. Scum layer where bacteria grows on surfaceExplanation
Pellicle refers to a scum layer that forms on the surface of a liquid, typically a broth, where bacteria can grow. It is a visible film or membrane that develops due to the accumulation of bacterial cells and other substances. This layer is often observed in microbiology experiments and can indicate the presence of bacterial growth on the liquid's surface.Rate this question:
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- 4.
What is a ring describing bacteria?
- A.
Coudiness
- B.
Bacteria suspended throughout the entire broth
- C.
Bacteria settles at the bottom
- D.
Bacteria grows up the side of the glass
Correct Answer
D. Bacteria grows up the side of the glassExplanation
The correct answer is "Bacteria grows up the side of the glass." This describes a phenomenon called "ring formation" where bacteria form a visible ring or film on the sides of a glass container. This can occur when certain bacteria have the ability to adhere to surfaces and grow in a biofilm. The bacteria attach to the glass and multiply, forming a distinct ring-like pattern. This is often observed in laboratory settings when culturing bacteria in broth or liquid media.Rate this question:
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- 5.
What does Ubiquitous mean?
- A.
Bacteria is no where
- B.
Bacteria is everywhere
- C.
Bacteria grows with food
- D.
Bacteria grows on certain time frames
Correct Answer
B. Bacteria is everywhereExplanation
Ubiquitous means that something is present or found everywhere. Therefore, the correct answer is "Bacteria is everywhere." This implies that bacteria can be found in various environments and locations, indicating its widespread presence.Rate this question:
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- 6.
Arrangements: strepto
- A.
Chaining
- B.
Clusters
- C.
Group of 4
- D.
Palisade
Correct Answer
A. ChainingExplanation
The given word "strepto" can be rearranged to form the word "chaining". The other options "clusters", "group of 4", and "palisade" cannot be formed using the given letters. Hence, "chaining" is the correct answer.Rate this question:
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- 7.
Arrangements: Staphylo
- A.
Chaining
- B.
Clusters
- C.
Group of 4
- D.
Next to each other
Correct Answer
B. ClustersExplanation
The given arrangements involve the word "Staphylo" and the concept of chaining clusters. The word "clusters" refers to a group of four or more things that are next to each other. Therefore, the correct answer "Clusters" is the most suitable option that satisfies the given conditions of the question.Rate this question:
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- 8.
Arrangements: Tetrad/Sarcinae
- A.
Singly
- B.
Chaining
- C.
Clusters
- D.
Group of 4
Correct Answer
D. Group of 4Explanation
The given arrangements, Tetrad/Sarcinae, refers to a grouping or arrangement of four entities. This can be seen in the options provided, where "Group of 4" accurately describes the arrangement. The other options such as "singly," "chaining," and "clusters" do not accurately represent the idea of a group of four. Therefore, the correct answer is "Group of 4."Rate this question:
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- 9.
Arrangements: Palisade
- A.
Chaining
- B.
Clusters
- C.
Next to each other
- D.
Group of 4
Correct Answer
C. Next to each otherExplanation
The term "Next to each other" suggests that the elements or objects mentioned in the arrangements are placed in close proximity to one another, without any gaps or spaces in between. This implies that they are arranged in a sequential or consecutive order, following one after the other. Therefore, the correct answer in this context would be "Next to each other".Rate this question:
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- 10.
What color is Gram Negative stain?
- A.
Purple
- B.
Pink/red
- C.
Green
- D.
Blue
Correct Answer
B. Pink/redExplanation
Gram Negative stain is a type of bacterial staining technique used in microbiology. It involves the use of crystal violet dye, iodine, alcohol, and a counterstain called safranin. The stain is used to differentiate between two major groups of bacteria: Gram-positive and Gram-negative. Gram-negative bacteria have a thinner peptidoglycan layer in their cell walls, which allows the crystal violet dye to be easily washed away during the decolorization step. As a result, Gram-negative bacteria appear pink or red after the application of the counterstain safranin. Therefore, the correct answer is pink/red.Rate this question:
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- 11.
Effects of temperature: Psychrophile
- A.
Likes colder environments
- B.
Grows in heat
- C.
Likes our body temp
- D.
Likes Georgia
Correct Answer
A. Likes colder environmentsExplanation
Psychrophiles are microorganisms that thrive in cold environments. They are adapted to survive and grow in temperatures below 20°C. This means that they are able to function optimally in colder conditions compared to other organisms. While they may still be able to grow in warmer temperatures, their preference and ability to thrive are highest in colder environments. Therefore, the statement "Likes colder environments" accurately describes the effects of temperature on psychrophiles.Rate this question:
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- 12.
Effects of temperature: Mesophile
- A.
Likes the desert
- B.
Likes hot temperatures
- C.
Likes cold temperature
- D.
Likes our body temp
Correct Answer
D. Likes our body tempExplanation
Mesophiles are organisms that thrive at moderate temperatures, typically around our body temperature. They are adapted to the conditions found in our bodies and can survive and reproduce within this temperature range. Unlike extremophiles, which prefer extreme temperatures, mesophiles are not suited for extremely hot or cold environments. Instead, they have evolved to function optimally at the temperature range commonly found in the human body. This adaptation allows them to efficiently carry out their biological processes and maintain their metabolic activities within our body.Rate this question:
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- 13.
Effects of Temperature: Thermophile
- A.
Likes hotter Temperatures
- B.
Likes colder Temperatures
- C.
Likes our body temperatures
- D.
Likes the tv
Correct Answer
A. Likes hotter TemperaturesExplanation
The given answer "Likes hotter temperatures" is correct because thermophiles are organisms that thrive in high temperatures. They have adapted to survive and reproduce in extreme heat, such as hot springs or deep-sea hydrothermal vents. These organisms have specific enzymes and proteins that can withstand the high temperatures and perform their functions effectively. Therefore, thermophiles prefer and are well-suited to hotter temperatures.Rate this question:
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- 14.
Pasturization
- A.
Kills all bacteria
- B.
Kills microbes
- C.
Only enough to kill the bad bugs
- D.
Kills everything and everyone
Correct Answer
C. Only enough to kill the bad bugsExplanation
Pasteurization is a process that involves heating a food or beverage to a specific temperature for a certain period of time in order to kill harmful bacteria, viruses, and other pathogens. However, it does not kill all bacteria or microbes present. The purpose of pasteurization is to eliminate or reduce the number of harmful microorganisms to a safe level, ensuring that the product is safe for consumption. Therefore, the correct answer is "Only enough to kill the bad bugs."Rate this question:
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- 15.
Sterilization
- A.
Kills all bacteria
- B.
Kills some bacteria
- C.
Kills you
- D.
Kills nothing
Correct Answer
A. Kills all bacteriaExplanation
Sterilization is a process that aims to eliminate all forms of microbial life, including bacteria. It involves using various methods such as heat, chemicals, or radiation to destroy or deactivate the microorganisms. Therefore, the correct answer is "Kills all bacteria."Rate this question:
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- 16.
Why does different color dyes spread differently
- A.
Molecular weight and solubility
- B.
One color is stronger than the other
- C.
One color is brighter
- D.
They both spread the same
Correct Answer
A. Molecular weight and solubilityExplanation
Different color dyes spread differently due to their molecular weight and solubility. Molecular weight refers to the size of the dye molecules, with larger molecules spreading slower than smaller ones. Solubility, on the other hand, determines how easily the dye dissolves in a solvent or medium. Dyes with higher solubility will spread faster compared to those with lower solubility. Therefore, the differences in molecular weight and solubility between different color dyes result in variations in their spreading patterns.Rate this question:
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- 17.
What is aero-tolerent
- A.
Bacteria that can grow with oxygen or without
- B.
Bacteria that grows with oxygen
- C.
Bacteria that grows without oxygen
- D.
Bacteria that eats constantly
Correct Answer
A. Bacteria that can grow with oxygen or withoutExplanation
Aero-tolerant bacteria are able to grow in the presence or absence of oxygen. This means that they are not dependent on oxygen for their growth and can survive in both aerobic and anaerobic conditions. These bacteria have the ability to tolerate and adapt to different environmental conditions, allowing them to thrive in various habitats.Rate this question:
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- 18.
What is Facultative Anaerobic bacteria?
- A.
Means bacteria prefers oxygen but "in a pinch" can grow without oxygen
- B.
Means bacteria can grow without oxygen
- C.
Means bacteria can grow with oxygen
- D.
Means bacteria doesn't like like anything
Correct Answer
A. Means bacteria prefers oxygen but "in a pinch" can grow without oxygenExplanation
Facultative anaerobic bacteria are organisms that prefer to grow in the presence of oxygen, but they can also survive and grow in the absence of oxygen if necessary. This means that they have the ability to switch between aerobic respiration (using oxygen) and anaerobic respiration (using other electron acceptors) depending on the availability of oxygen. These bacteria are versatile and can adapt to different environments, making them capable of surviving in both oxygen-rich and oxygen-poor conditions.Rate this question:
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- 19.
Low selective toxitity
- A.
Kills bacteria not good human cells
- B.
Kills all bacteria
- C.
Kills no bacteria
- D.
Kills all cells good and bad
Correct Answer
A. Kills bacteria not good human cellsExplanation
The correct answer suggests that the substance being referred to has low selective toxicity. This means that it is able to kill bacteria without harming good human cells. In other words, it specifically targets and eliminates bacteria while sparing the healthy human cells. This characteristic makes it an effective treatment option for bacterial infections, as it can effectively eliminate the harmful bacteria without causing harm to the patient's own cells.Rate this question:
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- 20.
Denature Proteins
- A.
Starves bacteria
- B.
Disruption n possible destruction of both secondary and tertiary structures
- C.
Disrupting many things of bacteria including ribosomes
- D.
Disrupting many good and bad cells
Correct Answer
B. Disruption n possible destruction of both secondary and tertiary structuresExplanation
Denaturing proteins refers to the process of altering the structure of proteins, particularly the secondary and tertiary structures. This disruption can lead to the possible destruction of these structures, rendering the protein non-functional. In the context of bacteria, denatured proteins can interfere with essential cellular processes, such as the functioning of ribosomes. This disruption affects both good and bad cells, potentially leading to the starvation and destruction of bacteria.Rate this question:
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- 21.
Oligodynamic
- A.
Chemical agent that stops bacteria from reproducing
- B.
Kills some bacteria and not others
- C.
Action to which a metal affects something
- D.
Kills all bacteria
Correct Answer
C. Action to which a metal affects somethingExplanation
The term "oligodynamic" refers to the action in which a metal affects something. This can include the inhibition or prevention of bacterial growth and reproduction. The use of certain metals, such as silver or copper, has been found to have antimicrobial properties and can effectively kill or inhibit the growth of bacteria. Therefore, the correct answer in this case is "Action to which a metal affects something."Rate this question:
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- 22.
Bacteriostatic
- A.
All bacteria has a low degree to which the substance can damage an organism
- B.
Place around the substance where there is no growth
- C.
Substance that kills bacteria but nothing else
- D.
Biological or chemical agent that stops bacteria from reproducing
Correct Answer
D. Biological or chemical agent that stops bacteria from reproducingExplanation
The correct answer is "Biological or chemical agent that stops bacteria from reproducing." Bacteriostatic refers to an agent that inhibits the growth and reproduction of bacteria without necessarily killing them. It prevents the bacteria from multiplying and spreading, allowing the body's immune system to eventually eliminate them. This is different from a bactericidal agent, which kills bacteria outright.Rate this question:
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- 23.
Brownian Motion, entire thing must be true
- A.
Particles in suspension due to H20
- B.
Particles suspended in H20 and are shaking due to water movement
- C.
Particles that move from one side of the slide to the other
- D.
Particles Moving in different directions
Correct Answer
B. Particles suspended in H20 and are shaking due to water movementExplanation
The correct answer is "Particles suspended in H20 and are shaking due to water movement." This answer accurately describes the concept of Brownian motion, which is the random movement of particles suspended in a fluid due to the constant collisions with the fluid molecules. The shaking or movement of the particles is caused by the random motion of water molecules.Rate this question:
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Mar 22, 2023Quiz Edited by
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Sep 28, 2011Quiz Created by
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